[Bug] Workspace prompts and skills not recognized by plugin (ADT/Eclipse)

Environment

• OS: Windows 11
• Eclipse Version: 2026-03 + ADT
• Plugin Version: 18

Describe the bug
The plugin does not load the prompts and skills configured in the current workspace directory. This bug predates version 18 and has never worked for my setup. Now that we can place more than the copilot-instructions.md into the workspace folder, I would really like to use this feature.

To Reproduce
Steps to reproduce the behavior:

1. Set up a workspace with ABAP ADT installed and add a project to it
2. Create the .github directory beside the .metadata folder
3. Create the prompts and skills directories and fill them with .md files as described in the documentation. In the case of prompts, I created the file example.prompt.md
4. Type / in the chat box to see loaded prompts. Restarting Eclipse does not solve the issue.

Expected behavior
At least prompts should show up under /, as there is no obvious reason for them not to work in an ADT project. I have noticed that the .github folder is actually opened by Eclipse, so I am not sure what is stopping it from loading the prompts. I also took a look at the logs and found no errors regarding this issue.

Reproduce this in Eclipse 2026-03 with ADT by placing .github beside .metadata and adding prompts and skills directories containing the documented .md files. Start from the workspace loading behavior and the chat box's / prompt discovery, then check the Eclipse logs. Done means the example.prompt.md prompt appears under / and workspace skills are recognized without restarting Eclipse.